per Mike Frysinger's suggestion, change the word detection functions'

per Mike Frysinger's suggestion, change the word detection functions'
behavior back to what it was before (for now, until there's a way for
the user to control it), as their new behavior makes them harder to use
when editing source code; by the same token, leave word count's behavior
the way it is, since it's generally not used when editing source code

git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@2765 35c25a1d-7b9e-4130-9fde-d3aeb78583b8